First of all, thank for the thoughtful replies. Second, while one replier assumed I was the source of noise, that hasn't been the case, at least not so far.
I actually own a commercial unit in the condo, not a residential unit. I bought my first floor store-front unit about 3 years ago. At that time the unit was occupied by a tenant pizza shop business. They eventually defaulted on their lease. So I took possession and spent about 2 years gutting and then building my own restaurant in it. The space was zoned for a restaurant and has historically always been a restaurant or bar, even before the condo was created. This 3-story masonry building is over 100 years old.
I have invested a huge amount of money (for me) in the purchase and build-out. My concern is that at some time, I may fall out of grace with the rest of the condo owners. If so, who's to say they can't make some change to the by-laws prohibiting my kind of business. During the planning and build-out, I did everything I could physically to be able to operate w/o disturbing my neighbors. But restaurants can be loud and customers that are coming and going can be even more loud. It's impossible to control that kind of noise. I suggest the same in some cases for the residental units. For example, who can control who pushes the wrong buzzer in the middle of the night? This building is located in a very well known restaurant and club district. It's not as rowdy as say the French Quarter, but there's a lot of nightlife on a typical weekend and even during the week.
Since my unit is zoned for restaurant/bar use, and since my construction was permitted, inspected, and approved by the city, will I always have rights to operate as a typical restaurant and bar operates? Can the condo board take those rights away? How should I deal with neighbors that complain about vibrations? I've already received a few of those kinds of compliants. I can only do so much to address and remedy them.
So far, we typically close up before midnight, but what if I wanted to extend my hours?
These are the kinds of issues I was concerned about when I first posted. Just wanted to clarify that. Thanks again!